Elevator.



J. A. LINN.

ELEVATOR;

APPLICATION FILED MAR. 3, I919. v Patented Apr. 29, 1919.

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J. A. LINN.

ELEVATOR.

A'PPLICATION FILED MAR. 3, 1919.

Patented Apr. 29,1919.

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JOHN A. LINN, 0F DENVER, COLORADO.

ELEVATOR.

Specification of Letters Patent. Pafgnteql Apr, 29, 191g,

' Application filed March 3, 1919. Serial No.'280,236.

To all whom it mag concern:

Be it known that I, JOHN A. LINN, a citizen of the United States, residing at Denver, in the county of Denver and State'of Colorado, have invented new and useful Improvements in Elevators, of which the fol lowing is a specification.

My invention relates to elevators and particularly to an automatic safety device or catch mechanism for elevators whereby in the event of the cable or cables'relaxing or breaking, or the motor gettingiout of order, the safety mechanism will be immediately brought into use and serve to arrest the descent of the car, thereby preventing injury of the passengers and the demolition of the car. 1

With the above and other objects in View, the invention consists inthe novel construction, combination and arrangement herein fully described, illustrated and claimed.-

In the accompanying drawings Figure 1 is a side elevation of the car of the elevator showing the safety mechanism in its applied relation thereto, and the adj acent guide rails.

Fig. 2 is a central vertical section through the same taken at a right angle to Fig. 1.

Fig. 3 is a central vertical section taken at a right angle to Fig. 2.

Fig. 4 is a bottom plan View of the car, showing the guide rails and racks in cross section.

Fig. 5 is a fragmentary vertical section on the same line as Fig. 3, showing the operative positions of the catches.

Referring to the drawings, 1 designates the car of the elevator, which is supported by the cable 2 and guided in its travel by the vertical guide rails 3, of angle iron for mation in cross section and secured to vertical posts or frame members 4: at the four corners of the elevator shaft or well.

In carrying out the present invention, in the preferred embodiment thereof, I employ a plurality of catches 5, four in numher, having their engaging ends arranged in close proximity to the corners of the car as shown in the bottom plan view, Fig. 1. These catches are mounted between their ends on pivots 6, supported by brackets 7, and the inner arms of said catches 5 are formed with longitudinal slots 8 and overlapped in pairs, as shown. Passing through toward and away from the bottom 10 of the 1 car. The opposite ends of the rod 9-are inserted through the lower ends of the pendent arms 11 of an inverted U-shaped hanger 12, shown as of channeled iron formation, the ends of the rod 9 being headed, as shown at 13. The hanger 12 is shown as secured to the cable 2 by a clevis or coupling 14..

The arms 11 are provided with oppositely projecting supporting shoulders 15 which normally lie in supporting contact with the lower'extremities of the flanges 16 of channel guides 17 fastened to the opposite sides of the car 1. The weight of the car is thus normally. carried bythe shoulders 15, making a strong construction. Other guides 18 for the arms 11 of the hanger 12 are secured to the .car at a lower point. Each of the brackets 7 has a supporting shoulder 19 against which the adjacent catch 5 rests in supporting contact when in car holding position.

Springs 20 are fastened to the bottom of the car and bear downwardly upon the rod 9, thereby serving to quickly depress said rod when the cable 2 is relaxed or becomes broken, with the result that the catches 5 are swung 011 their pivots to car stopping position, and against the shoulders 19.

The guide rails 3 are of special formation being of l. shape in cross section and having rack faced extensions 21 to be engaged positively by the catches 5 when the latter are released and thrown outwardly. Angle wear plates or shoes 22 are fastened to the corners of the ear and ride in contact with the guide rails 3 thus giving a smooth and steady travel to the car and affording the necessary bracing for the car when the catches 5 are brought into use.

From the foregoing description, taken in connection with the accompanying drawings, it will now be seen that ordinarily the car is eflectively supported upon the hanger by the shoulders 15 and when the catches are thrown into use they are braced and supported by the shoulders 19, thereby relieving the pivots 6 of a great part of the strain and weight which might otherwise be imposed thereon. The springs 20 insure the quick action of the catches and render the safety mechanism certain and reliable in operation.

The safety mechanism is furthermore very simple in construction and operation and therefore notliable to get out of order.

I claim:

1. The combination with an elevator car, and the raising and lowering cable thereof, of oppositely extending catches having their outer extremities normally within the vertical plane of-the car, brackets on the bottom of the car to which said catches are pivoted between their endsandhaving supporting shoulders to brace the catches when the latter move to'their catching positions, the inner ends of said catches overlapping and being formed with longitudinal slots, an inverted U-shaped hanger attached to said cableandhavingpendent arms at opposite sides of the-canand a rod carried by the lower ends of said arms and working in the slots of the catches.

2. The'combination with an elevator car, and the raising'andlowering cable thereof, of oppositely extending catches having their outerextremities normally within the vertical plane of the car, brackets on the bottom of the car to which said catches are pivoted between their ends and having supporting shoulders to brace the catches when the latter move totheir catching positions, the insides oi'i'zthevcar, ,a rod carried by the lower ends of said arms and working in the slots o'JfJthe catches, oppositely located shoulders on said arms, and guides on the car for said arms and serving also as stops to cooperate with said shoulders to normally support the car on thehanger.

3. The combination with an elevator car, and the raising and lowering 'cable;ther eof, of a plurality of sets of oppositely extending catches having their outer'extremitiesnormally within'the vertical plane of the car, brackets on the'bottomofithe car to which said catches are pivoted-betweentheir ends and having supporting shoulders to brace the catches when the latter move to their catching positions, the inner ends of said catches overlapping and'being formed with longitudinal slots, an inverted U-shaped hanger attached to said cable and having pendent arms at opposite sides of the car, and a rod carried by the lowerends-of said arms and working in the slots ofthe catches.

In testimony whereof I aiiixany signature.

JOHN A. LINN.

Copies OfithiS ;patent may be obtained for five cents each,.by addrcssingat11e ffiommissionernofelatents,

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